Hot-air furnace



(No Model.) 3 Sheets-Sheet 1. W. PHIPPS.

HOT AIR FURNACE.

No. 349,518. x Patented Sept. 21, 1886.

m 55 es (No Model.) 3 Sheets- 81mm 2.

W. PHIPPS.

. HOT- AIR FURNACE. No. 349.518. Patented Sept. 21, 1886.

N4 PETERS. PholwLilhogmphur, Washinginn. n. c

(No Model.) 3 Sheets sheet, 3. W. PHIPPS HOT AIR FURNACEx No. 349,518. Patented Sept. 21, 1886.

U ITED STATES PATE T OFFICE.

IVILLIAM PHIPPS, OF MILWAUKEE, VVISOONSIN.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 349,518, dated September 21, 1886.

Application filed October 9, 1885.

To all whom it may concern:

Be it known that I, WILLIAM PHIPPs, of Milwaukee, in the county of Milwaukee, and in the State of IVisconsin, have invented certain new and useful Improvements in Hot- Air Furnaces;-and I do hereby declare'that the following is a full, clear, and exact description thereof.

My invention relates to hot-air furnaces; and it consists in certain peculiarities of construction, as will be hereinafter described.

In the drawings, Figure 1 represents a front elevation of my improved furnace; Fig. 2, a vertical transverse section of the same online w as, Fig. 1; Fig.3, a top plan view with the smoke-flue removed'and shown in dotted lines; Fig. 4, aprojected sectional view of the crown or radiator on line w, Fig. 3; Fig. 5, a horizontal section on line y Fig. 2. A represents the ash-pit of my improved furnace; B, the grate; G, the fire-pot; D, the

dome, and E the water-chamber.

Adapted to surmount the dome D is a crown or radiator composed of two sections, F F, to the upper oneof which latter is secured the smoke-flue G.

The parts A,O, D, F, and Fare, respectively, formed with upper grooved rims, (0, adapted to receive the lower plain rims, b, of each opposing part, and the joint thusformed is made air and gas tight by means of a packing of cement or other suitable material introduced in each of said grooved rims on both sides of the part located therein.

The grate B is preferably suspended in the ash-pit A, below the fire-pot C, so that the ashes will not accumulate in said fire-pot to deadeu the fire. I usually provide the circumference of this grate with a series of upward projections, c, which projections are designed to rake down the ashes and clinkers that have a tendency to clog toward the outer extremity of said grate, and so accumulate as to prevent its ready action when it is desired to stir the fire.

Extending from the front of the ash-pit A up through the water-chamber E to the fuelentrance d is a dust-flue, H,-provided at its lower end with aperforated slide, 6, operating 50 in suitable guides, and adapted to entirely open Serial No. 179,400. (No model.)

said flue when the grate B is agitated to remove the accumulated ashes. WVhen the fire is raked down by the agitation of the grate, a

damper, I, in the front central flue of the dome D, is opened and the slidee of the dust-flue H drawn forwardto entirely open the latter, and by direct draft the dust and gases generated in the ash-pit are carried into the smoke flue G. After the operation of raking the fire is completed the damper I is closed, and the slide 6 at the bottom of the dust-flue H pushed in. The perforations in the latter permit the air in the ash-pit to ascend and circulate in the dome D over the fire, thus aiding combustion, so as to consume thegases generated in said dome, and prevent explosions incident to heaters in which 'the combustion is not thorough. Y

The dome D is provided with a series of dues, f, the central front one of which is pro-' vided with the damper I, above described, said dome being corrugated upon its apex f, to compensate for the expansion and contraction of the metal of which it is constructed. To this domeD is secured, in the manner above described, the lower section, F, of the crown or radiator, and similarly secured to the latter is the upper section, F, of said crown or radiator. These sections when united form a closed circular shell having a central opening, into which'is extended the apex f of said dome. The lower crown or radiator section, F, is constructed with a series 'of prismoidal pockets, g, terminating in vertical upwardly-extended webs h at the point of juncture of each pair of pockets throughout the series, said pockets converging toward the center of the section. The upper section, F, of the crown or radiator is constructed with a series of prismoidal caps, 2', arranged with relation to the prismoidal pockets 9 of the lower section, F, and the point of juncture 7c of each pair of caps throughout the series in the former section extends down into the pockets of the latter on' a line with the vertical centers of said pockets and the flues of the dome D. The points of juncture of the prismoidal caps appertaining to the upper section of crown or radiatorbeing extended down into the pockets of the lower section on a line with the vertical centers thereof, the upward1y-extending webs h of these pockets are at the same time projected up into said caps on a line with the vertical tor section form bearings, and at the same time permit of this flue being set lower than is ordinarily the case, thereby effecting a gain of space or head-room in shallow cellars. Not only does therear prismoidal cap of the upper crown or radiator section, F, act as a bearing for the smoke-flue, but by being of a less elevation than the other caps in the same relative series its top is brought closer. to the vertical web uniting the rear couple of prismoidal pockets in the lower section, F, of said crown or radiator, and thus acts to partially divide the draft, so that theproducts of combustion will be circulated in two directions, as indi cated by the arrows, Fig. 4. The smoke-flue at its front end is provided with a door, which latter may be opened to dampen the fire, or to permit of ready access to said flue for the purpose of cleaning.

The fuel-entrance, water-chamber, and ashpit of the heater are severally provided with doors, those of the fuel-entrance and ash-pit having the customary slides by which to regulate the fire.

In the operation of my invention, when fire is kindled in the pot G the smoke andgases generated by combustion accumulate in the dome D and find their exit through the flues f of this latter part into the crown or radiator composed of the sections F F, first enter ing the prismoidal pockets 9 of the lower one of saidsections. Theproductsof combustion continue in their direct ascent until they come against the points of juncture 7c of the prismoidal caps i composing the upper crown or radiator section. The divided draft now causes these products of combustion to circu late in two directions toward the opening Z, leading into the smoke-flue G, and as this circulation continues said products of combustion from one pocket are drawn up over the vertical webs h at the upper terminus of said pocket, and then down on each side into the adjacent pockets, and this operation continues throughout the crown or radiator until the exit into the smoke-flue is reached. By this alternate up and down circulation the products of combustion are not only traveled over a greater area, to thereby produce a greater friction,

and thus generate alarger amount of radiated heat, but at the same time the smoke and gases from one pocket, after reaching the highest point of ascent, are drawn down into the ator until the final pocket leading into the smoke-flue is reached, from which latter the smoke and gases not consumed are by direct draft drawn into the said flue.

In practice my furnace is to be inclosed in a casing, and the heated air generated is conducted through the casing into the ordinary delivery-tubes, said air passing between the sides of the casing and furnace, and also up through the crown and between the sides of the upper caps, being raised by contact therewith to a very high temperature.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a hot-air furnace, the combination, with a fire-pot and a dome provided with fines, of a crown-piece or radiator having its lower portion provided with a series of pockets connecting with the dome-fines and joined at their upper ends, and the upper portion of this crown-piece or radiator provided with a series of caps joined at their lower ends and arranged to come in line with the vertical centers of said pockets, substantially as and for the purpose described. j

2. In a hot-air furnace, the combination, with a fire-pot and a dome provided with fines, of a crown-piece or radiator consisting of a sectional shell, the lower section comprisinga series of pockets joined at their upper ends throughout the series, the upper section comprising a series of caps joined at their lower ends throughout the series, and said sections relatively united, whereby the joined ends of the pockets and those of the caps are brought in alternate arrangement, substantially as and for the purpose set forth.

3. In a hot-air furnace, the combination, with a fire-pot and a dome provided with fines, of a two-section crown-piece or radiator, the lower section consisting of a series of prismoidal pockets connecting with the dome-flues, and joined at their upper ends, the walls at their points of juncture being upwardly extended throughout the series, and the upper section consisting of a series of prismoidal caps joined at their lower ends, and the walls at their points of juncture being extended down into the pockets of the former section, substantially as described.

4. In a hot-air furnace, the combination, with the fire-pot, a dome provided with flues, and a smoke-flue, of a two-section crown-piece or radiator, the lower sectionconsisting of a series of prismoidal pockets connecting with the dome-fiues and joined at their upper ends, the upper section consisting of a series of prismoidal caps joined at their'lower ends and alternately arranged with relation to the joined ends of the pockets, the rear one of the caps of less elevation than the others in the series,

and the front one countersunk and provided with an opening registering with a similar opening in the smoke-flue that is supported by said front and rear caps, substantially as and for the purpose set forth.

5; In a hot-air furnace, the combination, with a fire-pot and a dome provided with flues, of a two-section radiator, the lower section consisting of a series of prismoidal pockets connecting with the dome-fines and joined at their upper ends, the upper section consisting of a series of prismoidal caps joined at their lower ends and alternately arranged with relation to the joined ends of the pockets, a damp- 

